Planishing hammer support



. Filed June 11, 1941 gwvwom ELME'R J. EBIDEN Patented Mar. 20, 19 45Elmer J. Seiden, Jackson, Mich., assignor to bakley D. Lutes and EmoryLutes, Jackson, Mich., doing business as Selden Pneumatic Tool Com:

pany

Application ml 11, 1941, Serial N 39m534 The present invention relatesto percussion tools, and more particularly to a stand for. supporting aplanishing hammer.

Stands according to prior art for supporting planishing hammersconventionally'consist of a base, which supports a vertical column. Thecolumn supports an anvil and the planishing hammer. The objection tothis typeof stand resides inthe fact that for cylindrical columns whichare conventionally employed to permit easy'verti'cal adjustment of thehammer and the anvil, there is a period of vibration, with the resultthat when the hammer reciprocates at a certain rate, the column willvibrate interfering with the operation of the hammer. The vibration ofthe column results in the hammer striking the work at a ratesubstantially less thanthe rate of reciprocation of the hammer, thusslowing up-the hammering and introducing'an irregularity in thehammering which makes impossible the p-roductionof work with a finishedappearance.

According to present invention, the foregoing difficulties havebeeneliminated by providing two columns disposed one behind the other withrespect to the hammer for supporting the hammer.

Accordingly, an object of the present invention is to provide twocolumns, one disposed behind the other with'respect to the hammer andits anvil.

Another object of the invention is to provide a stand for percussiontools and the like, having a base from which two columns project andsupporting structure clamped to said columns, the supporting structureserving to rigidly space the columns.

These and other objects residing in the arrangement, combination, andconstruction of the parts will be apparent from-the followingspecification when taken with the accompanying drawing in which:

Fig. 1 is a side elevation of a percussion tool stand according to thepresent invention, and

Fig. 2 is a section on the line IIII of Fig. l, and

Fig. 3 is a general'section illustrating a three column stand.

Referring particularly to the drawing, the reference character Iindicates a base having recesses 2 for receiving the heads of boltsemployed to secure the base I to the floor. Projecting upwardly from thebase I are columns 3 and 4, secured t0 the base I and being disposed inparallel relation. The columns 3 and 4 may be of the same or diflerentdiameters.

Clamped to the columns 3 and 4 is a bracket 5 supporting an anvil 6. Asshown particularly in Fig. 2, the bracket 5 is provided at one endthereof with a split I passing through bores 8.

The columns 3 and 4am disposed in the bores 8 and bolts 9 are employedto clamp the-bores '8 against the sides of the columns 3 and 4, thesplit I permittingthe clamping action; The anvil 3 is similarly securedin a bore l0, disposed atthe opposite end of 'thebracket 5 and havingcommunicating therewith a split ll. Bolts l2 are employed to clamp thebore 5 I ll against the anvil 6. It will be appreciated that the bracket5 may be slid vertically along the columns 3 and 4 by loosening thebolts 9 and then tightening them again when the bracket 5 has been movedto. its adjusted position.

Clamped'to' the columns 3 and 4 above the bracket 5 is a bracket i5. Thebracket-l5 is similar to the bracket 5 in that it is provided with boresfor receiving the columns 3 and 4 corresponding to bores 8 in thebracket 5, and a split corresponding to-thesplit 1 in the bracket 5, sothat the bracket l5 may be clamped to the columns 3 and 4 by bolts I6.Suitably secured to the outer end of the bracketl5 is a pneumatic hammerI'I. Communicating with the hammer I1 is a compressed air valve l8 forcontrolling the rate of flow of compressed air to the pneumatic hammerl1. Mounted on the bracket I5 is a shut-off valve 19 connected to thevalve It by a conduit 20 and to a source of compressed air by a conduit2|. The shut-off valve I9 is controlled by a foot pedal 22 through asystem of links and levers 23, not a part of the present invention.

' It is thought that the above described irregu lar operation of apneumatic planishing hammer similar to that disclosed, but provided withonly one column instead of the two columns 3 and 4, is due to the factthat the reciprocation of the hammer l1 and the impact of the sameagainst I the anvil 3 causes the single column to vibrate when the rateof reciprocation of the hammer i1 is "equal to the natural period ofvibration of the single column or some multiple thereof, and

that the anvil is thus caused .to vibrate through its connection withthe single column. It is further throught that due to the weight of theanvil mer does not engage the work at therate of re-' ciprocation of thehammer, but at a very much the brackets and I5 may be supported solelyfrom the column 3 while other means z'fl'le provided to clamp thecolumns 3 and 4 rigidly together. For instance, the 'bracket l ilrnig'htbe employed as shown whilejthe bracket Tor the anvil 6 is clamped onlyto the-column 3to'permit sidewise swinging of the same. Accordingly itis porting brackets each provided with clamping means toward one end andsupporting means at the opposite :end, means rigidly clamping the clampmeans of one of said brackets on said upstanding spaced columns near theupper end contemplated that such arrangements may the employed with thescope of the present invention.

Another embodiment of the invention is disclosed iniFisure -3 wherein athree column .stand is disclosed. In this-form of the :invention threecolumns, -2-6 :and 21, :are employed, secured to a hose '28. It will beobserved that each of the rear columns 26 :and 21 -a-re-generally behindthe front column 25, .thus obtaining generally the same zresultsias areobtained with the sttuctureroi Figures 1 and 2. Associated withthe=columns 25,16 and 21 are appropriate brackets, not shown,iorzsupportin g hammer i-l andianvil 5-,each-.of the brackets extendingsubstantially .in the :direction of :the arrow in Figure 13.

Having thus described any invention, what I desire :to secure byLettersPatent'and claim is:

l. A stand :for a high speed ppercussion' tool or the like comprising abase, :a pair :of upright structural columns in spaced relation,\vertica'lly spaced horizontally extended members cantilevered a t-toneend and-rigidly mounted upon-and supporting said columnsinspacedrelation 28$ the other :end, said members being disposed insubstantially the same general vertical plane and in. the-.same-generalplane as uptight columns,

thereof with the supporting end thereof extend- 'ing in cantileveredrelation, and means rigidly clamping the second bracket on saidupstanding columns :belowth'efirst-mentioned bracket with the supportingend thereof also cantilevered and substantially vertically spaced belowthe cantilevered end (of the :upper -.bracket, the supporting ends ofsaid brackets being adaptable :tov one mount a percussion toolior the.likeand the other mount an anvil on their cantilevered .ends.

3. A stand .for.high speed percussion .tools :and thelikecomprising arigid base, ta-pair :pf upright structural columns upstanding in.substantially spaced relationfrom said base -a pair-ofsubstantiallyhorizontally disposed rbracket members eachprovided adjacent to one endwith openings receiving the spaced upstanding structural columns, saidzbrackets being -prouided :adjacent to theiropposite ends withpercussion tool and anvil supporting portions, and .meansirigidlymounting said bracket members :on the upper portions of said upstanding:structural :columns in vertically spaced relation with 'the supportingportions thereof outstanding laterally from said structural columns insubstantially vertically spaced relation, "said bracketseach lbeingrigidly, assembled and heldupon both of the-upstanding structuralcolumns.

, :ELMERJ. SEIDEN.

